Transponder for a radio-over-fibre transmission system allowing retransmission from the antenna management interface

Abstract

A transmission system includes: an optical transmission module capable of modulating a first digital radio signal in order to obtain a first optical signal; an optical reception module capable of receiving a second optical signal and demodulating same in order to obtain a demodulated radio signal; and a digitizing module capable of digitizing the demodulated radio signal in order to obtain a second digital radio signal. The transmission module includes: a module for adding a first management signal to the first digital radio signal, the rate of the first management signal being less than that of the first digital radio signal. The optical digitizing module includes an extraction module capable of extracting a second management signal from the demodulated radio signal, the rate of the second management signal being less than that of the second digital radio signal.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This Application is a Section 371 National Stage of International Application No. PCT / FR2016 / 051159, filed May 17, 2016, which is incorporated by reference in its entirety and published as WO 2016 / 185130 A1 on Nov. 24, 2016, not in English.1. FIELD OF THE INVENTION[0002]The patent application lies in the field of mobile telecommunication networks, and more particularly in the field of optical cable links between antenna sites and a site of the transport network.2. PRIOR ART[0003]A base station of a mobile network may comprise one or more antennas positioned at height, generally on a tower or a pylon. The radio broadcast signal processing is performed by an “RRH” (Remote Radio Head) element, positioned near an antenna, e.g. in the tower or at its foot, thanks to its small size. The digital signal, in turn, is processed by a “BBU” (Base Band Unit) element, which may be positioned far from the antenna, e.g. tens of kilometers away. The RRH a...

AI Technical Summary

Benefits of technology

The invention is a system for managing the processing of high throughput data signals. One advantage of the invention is that it allows for separation of low throughput management signals from high throughput data signals, reducing latency in the signal. The addition of the management signal is made easier and inexpensive using an electronic mixer. The extraction of the management signal is also made easier and inexpensive using a low-pass filter. The ratio of the throughput of a management signal to the throughput of a data signal is greater than or equal to 1000. Overall, the invention improves the efficiency and accuracy of processing high throughput data signals.

Problems solved by technology

This solution complicates the processing of the optical signal in the RRH and BBU elements, increases the cost of these elements, while adding a strong constraint on interoperability between these elements, particularly when they are manufactured by different suppliers.

Images